diff options
Diffstat (limited to 'firmware/2lib/2misc.c')
| -rw-r--r-- | firmware/2lib/2misc.c | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/firmware/2lib/2misc.c b/firmware/2lib/2misc.c index 86b866de..8e5444a6 100644 --- a/firmware/2lib/2misc.c +++ b/firmware/2lib/2misc.c @@ -574,3 +574,136 @@ int vb2api_use_short_dev_screen_delay(struct vb2_context *ctx) struct vb2_gbb_header *gbb = vb2_get_gbb(ctx); return gbb->flags & VB2_GBB_FLAG_DEV_SCREEN_SHORT_DELAY; } + +static void snprint_sha1_sum(struct vb2_packed_key *key, + char *dest, size_t dest_size) +{ + uint8_t *buf = ((uint8_t *)key) + key->key_offset; + uint64_t buflen = key->key_size; + uint8_t digest[VB2_SHA1_DIGEST_SIZE]; + int32_t used = 0; + int i; + + vb2_digest_buffer(buf, buflen, VB2_HASH_SHA1, digest, sizeof(digest)); + for (i = 0; i < sizeof(digest); i++) + if (used < dest_size) + used += snprintf(dest + used, dest_size - used, + "%02x", digest[i]); + dest[dest_size - 1] = '\0'; +} + +#define DEBUG_INFO_MAX_LENGTH 1024 + +#define DEBUG_INFO_APPEND(format, args...) do { \ + if (used < DEBUG_INFO_MAX_LENGTH) \ + used += snprintf(buf + used, DEBUG_INFO_MAX_LENGTH - used, \ + format, ## args); \ +} while (0) + +char *vb2api_get_debug_info(struct vb2_context *ctx) +{ + char *buf; + uint32_t used = 0; + + struct vb2_shared_data *sd = vb2_get_sd(ctx); + struct vb2_gbb_header *gbb = vb2_get_gbb(ctx); + struct vb2_workbuf wb; + char sha1sum[VB2_SHA1_DIGEST_SIZE * 2 + 1]; + + vb2_error_t rv; + uint32_t i; + + buf = malloc(DEBUG_INFO_MAX_LENGTH + 1); + if (buf == NULL) + return NULL; + + vb2_workbuf_from_ctx(ctx, &wb); + + /* Add hardware ID */ + { + char hwid[VB2_GBB_HWID_MAX_SIZE]; + uint32_t size = sizeof(hwid); + rv = vb2api_gbb_read_hwid(ctx, hwid, &size); + if (rv) + strcpy(hwid, "{INVALID}"); + DEBUG_INFO_APPEND("HWID: %s", hwid); + } + + /* Add recovery reason and subcode */ + i = vb2_nv_get(ctx, VB2_NV_RECOVERY_SUBCODE); + DEBUG_INFO_APPEND("\nrecovery_reason: %#.2x / %#.2x %s", + sd->recovery_reason, i, + vb2_get_recovery_reason_string(sd->recovery_reason)); + + /* Add vb2_context and vb2_shared_data flags */ + DEBUG_INFO_APPEND("\ncontext.flags: %#.16" PRIx64, ctx->flags); + DEBUG_INFO_APPEND("\nshared_data.flags: %#.8x", sd->flags); + DEBUG_INFO_APPEND("\nshared_data.status: %#.8x", sd->status); + + /* Add raw contents of nvdata */ + DEBUG_INFO_APPEND("\nnvdata:"); + if (vb2_nv_get_size(ctx) > 16) /* Multi-line starts on next line */ + DEBUG_INFO_APPEND("\n "); + for (i = 0; i < vb2_nv_get_size(ctx); i++) { + /* Split into 16-byte blocks */ + if (i > 0 && i % 16 == 0) + DEBUG_INFO_APPEND("\n "); + DEBUG_INFO_APPEND(" %02x", ctx->nvdata[i]); + } + + /* Add dev_boot_usb flag */ + i = vb2_nv_get(ctx, VB2_NV_DEV_BOOT_EXTERNAL); + DEBUG_INFO_APPEND("\ndev_boot_usb: %d", i); + + /* Add dev_boot_legacy flag */ + i = vb2_nv_get(ctx, VB2_NV_DEV_BOOT_LEGACY); + DEBUG_INFO_APPEND("\ndev_boot_legacy: %d", i); + + /* Add dev_default_boot flag */ + i = vb2_nv_get(ctx, VB2_NV_DEV_DEFAULT_BOOT); + DEBUG_INFO_APPEND("\ndev_default_boot: %d", i); + + /* Add dev_boot_signed_only flag */ + i = vb2_nv_get(ctx, VB2_NV_DEV_BOOT_SIGNED_ONLY); + DEBUG_INFO_APPEND("\ndev_boot_signed_only: %d", i); + + /* Add TPM versions */ + DEBUG_INFO_APPEND("\nTPM: fwver=%#.8x kernver=%#.8x", + sd->fw_version_secdata, sd->kernel_version_secdata); + + /* Add GBB flags */ + DEBUG_INFO_APPEND("\ngbb.flags: %#.8x", gbb->flags); + + /* Add sha1sum for Root & Recovery keys */ + { + struct vb2_packed_key *key; + struct vb2_workbuf wblocal = wb; + rv = vb2_gbb_read_root_key(ctx, &key, NULL, &wblocal); + if (rv == VB2_SUCCESS) { + snprint_sha1_sum(key, sha1sum, sizeof(sha1sum)); + DEBUG_INFO_APPEND("\ngbb.rootkey: %s", sha1sum); + } + } + + { + struct vb2_packed_key *key; + struct vb2_workbuf wblocal = wb; + rv = vb2_gbb_read_recovery_key(ctx, &key, NULL, &wblocal); + if (rv == VB2_SUCCESS) { + snprint_sha1_sum(key, sha1sum, sizeof(sha1sum)); + DEBUG_INFO_APPEND("\ngbb.recovery_key: %s", sha1sum); + } + } + + /* If we're in dev-mode, show the kernel subkey that we expect, too. */ + if (!(ctx->flags & VB2_CONTEXT_RECOVERY_MODE) && + sd->kernel_key_offset) { + struct vb2_packed_key *key = + vb2_member_of(sd, sd->kernel_key_offset); + snprint_sha1_sum(key, sha1sum, sizeof(sha1sum)); + DEBUG_INFO_APPEND("\nkernel_subkey: %s", sha1sum); + } + + buf[DEBUG_INFO_MAX_LENGTH] = '\0'; + return buf; +} |